Air-conducting pipe.



Patented Mar. 25, |9027?.

TNG. 696,059.

F. LINE.

AIR CNDUGTING PIPE. (Application med :une a7, 11599.)

(Ilo Model.)

INVENTm. "lAN-cm LIN:

EN w, 7 www! UNiTED STATES Y PATENT OFFICE.

FRANCIS LINE, OF CLEVELAND, OHIO.

AIR-CONDUCTINGPIP'E.

SEECIFICATIQN forming part of Letters Patent No. `696,059, dated March25, 1902.

Application filed J'une 27, 1899. Serial No. 722.050. (No model.)

To @ZZ whom it may concern:

Be it known that I, FRANCIS LINE, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Air-Conducting Pipes;and I do declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to airconducting pipes, and is more particularlydesigned to take the place ofthe furnace-pipes now in common use, butmay be used for cold air and other purposes as it may be foundapplicable.

In furnace-pipes inI which ventilation is re lied upon for safety theold construction requires a pipe with two walls of tin or otherA themand with such construction at the ends of the pipe-sections as willextend and keep open the course of ventilation from section to sectionthroughout the line of pipe. Hence the circulation of air in these pipesis chiefly :relied upon to protect the wall from overheat ing throughthem. It has been found, however, that such circulation or ventilationoften is veryimperfect and,in deed,not infrequently so defective thatthe air passages become closed up entirely by one reason or another,such as faulty work in placing the pipes or by their becoming clogged inthe air-passages. As a result of this it frequently occurs, especiallyin extremely cold weather when the lires are unusually hot, that theheat strikes through and starts a fire in the adjacent Wall. The faultof this may not be one of bad Workmanship so much asin the faultyconstruction of the pipes and their defective operation.

My invention has as one of its special objects the production of awall-pipe to substitute all pipes wherein such dangerous results arepossible and which is proof against danger in this way or on any suchaccount. My pipe is not dependent on an operation which can easily bechecked 'or entirely stopped, but has inherent qualities and resistanceswhich are the guarantee of its security. To these ends I have produceda'pipe in which a non-conducting material is employed both in lieu ofthe double tin or sheet-metal wall and of the air-space between them,all substantially as shown and described, and particularly pointed outin the claim.

In the'accompanying drawings, Figure lis a perspective elevation of asetof pipe-joints embodying my invention and showing at the top separatelya joint or union which belongs on its end. Fig. 2 is a verticalsectional elevation of the adjacent ends or portions of two pipe-jointsseparated to promote clearness of outline, but also near enough to showhow one member will closely lit in the other when brought together. Fig.3 is a cross-section of a part of one of the pipe-sections.

A represents one of my new and improved pipe sections or parts, whichmay be square,

as here shown, or round, or, indeed, of any de- Vand of vsuitablethickness or weight of stock to make it absolutely heat-proof in woodenwalls or for use in leading from the furnace to the wall I prefer tomake it of cellular form and of a depth which will occupy relativelyabout the same space as the old-fashioned wall-pi pe. This style ofpipel find is also preferred by the user, as its security against fireis so obvious.

In the style ofl pipe shown here there are three sheets o., b, and c,spaced equally apart by the ribbed or fluted intermediate portions d andd', thus making a double cellular structure. It Amight be single, andthe cells might be produced by other than luted material. With theflutes d and d. running at right angles to each other the body of thepipe is made exceptionallyiirm and rigid, vand to promote iiow of airthrough the pipe the interior surface maybe glazed.

Assuming that the pipe-sections are made the usual lengths or longer orshorter, as may be preferred, they each are provided at their ends withcouplings or overlapping joints B, as shown. These joints are built inor upon the ends of the pipes, so as to become mechanically andcommercially an essential part thereof, and are so fashioned that theyeach have a tongue 2 and an overlapping flange 3,

IOO

reverse as to each other where they come together, but alike otherwise.They also each have an inclined shoulder 5 between the tongue and flangewhich are supposed to meet when the pipe-sections are seated, thusaltogether making a very close joint where the sections meet.

I have named asbestos as a material adapted to my use; but I do notconne myself thereto and include mineral wool and all equivalent fibrousnon-combustible and noncouducting insulating materials.

W'hat I claim is- As a new article of manufacture, a hot-air pipe formedof a series of plain asbestos tubes and corrugated asbestos lling thespace between said tubes, whereby air-cells are formed FRANCIS LINE.

Witnesses:

H. E. MUDRA, R. B. MOSER.

